1993 Lexus LS400 electrical system problems
42 owner complaints filed with NHTSA name the electrical system on the 1993 Lexus LS400 — 65% of all complaints for this model year.
What owners report
“The first time my ecu failed was when I was parked I want to drive and the engine would not go above 1000rmps. I got the ecu replaced this was around 2013. The second time was a month ago. I was driving home from work had a huge thud in the engine and the same thing my car could no longer go above…”
filed Feb 28, 2017
“Dash functions don't work at times. Speed, fuel level,etc are not indicated when car is at rest or moving. This has been a recurring problem with the result that I fear driving the car and won't sell it as it is now. At around $1800 to repair with no guarantee the replacement is not buggy, I feel…”
filed Dec 10, 2016
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
LSB: When servicing interior electrical switches and components, please note the precautions in this bulletin to avoid damaging electrical components and switches. Many lubricants, cleaners, and automotive chemicals…
L-SB-0066-11 Rev · Service Bulletin/Repair Instructions · issued Apr 10, 2015
Electrical System problems in other LS400 years
| Year | Reports | Share |
|---|---|---|
| 1999 LS400 | 4 | 18% |
| 1998 LS400 | 9 | 20% |
| 1996 LS400 | 3 | 16% |
| 1995 LS400 | 12 | 31% |
| 1994 LS400 | 44 | 65% |
| 1991 LS400 | 1 | 5% |
| 1990 LS400 | 6 | 25% |
Other reported problem areas on the 1993 Lexus LS400
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.